混凝土受除冰盐侵蚀破坏机理及防治措施研究

RESEARCH ON COUNTERMEASURES AND DETERIORATION MECHANISM OF CONCRETE ERODED BY DEICING SALT

论述了混凝土受冰盐剥蚀破坏的特征 ,破坏的物理及化学机理和混凝土盐冻破坏的主要控制因素。分析了掺引气剂和降低水灰比对混凝土的抗盐冻侵蚀性能的改善 ;不同的掺合料硅灰、粉煤灰、矿渣、石灰石对混凝土抗盐冻性的影响 ;钢纤维与硅粉混合也是改善混凝土受冻剥蚀的有效措施。

In this paper,many aspects about deicing salt scaling were investigated,such as its characteristics,physical and chemical mechanism and many influences on the mechanism of deterioration.Addition of air-entraining and reduction of the w/c increase the deicing salt scaling resistance of concrete;Addition of silica fume?fly ash?limestone has different influences on the deicing salt scaling resistance of concrete; Because of the addition of steel fiber and air-entraining admixture, the frost resistance of concrete was improved;Combination of silica fume and steel fiber reinforcement is an effective measure to mitigate the damage of concrete;